I have had women of many different nationalities and backgrounds and many of them including Americans Canadians AND Latinas of all stripes have the issue of not wanting men to go down on them.
As far as higher paid pros being willing to do anything, I have never seen that correlation nor heard of it. To the best of my knowledge, higher paid girls have just as many limits as to what they will do as lower paid ones do. Of course, all those limits are really soft limits and envelopes can get pushed in some situations so it's really hard to make a good conclusion regarding that.
I always thought Brazil was one of the more urban nations on Earth. It certainly has the highest number of cities with over 1 million people.
The other thing is that your info in the US is maybe a little out of date. For example, if you go cruising the Sunset Strip looking for pussy in this day and age you are more likely to get your car impounded than to get laid. All you have to do is check out the NYC and LA sections of this same forum to see how much things have changed in the past several years! I'm sure this is part of the reason people are flying all over Latin America to look for pussy now!